Ruling · Mahāṣṭamī (Durgāṣṭamī) · 2015

Wednesday 21 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 251 minutes.

Decide it for

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Tuesday 20 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:01  11:49 madhyāhna ends
10:1310:3711:0111:2511:4912:1312:37

0 of 48 minutes covered

Midday of Wednesday 21 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

48 of 48 minutes covered

Aṣṭamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 16:53 on Tue 20 Oct to 16:00 on Wed 21 Oct.

    2015-10-20T08:53:19Z → 2015-10-21T07:59:50Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 20th, 11:00–11:48 on the 21st.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 20th and 48 of 48 on the 21st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 15087 s

  5. 05

    Ruling

    Mahāṣṭamī, Daqing, 2015: Wednesday 21 October.

    confidence: determinate

Say it like this

In Daqing, Mahāṣṭamī (Durga Ashtami) 2015 falls on Wednesday 21 October. Aṣṭamī runs from 16:53 on Tue 20 Oct to 16:00 on Wed 21 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2015/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 21 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 21 Oct
compat-drikpanchangComparison profileWed 21 Oct
No institution has a recorded ruling for Daqing.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/mahashtami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 8 Mahastami (paraviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles01:53 → 01:0012:1448 min12:130 min20 Oct
Chicago03:53 → 03:0012:1148 min12:110 min20 Oct
Jersey City04:53 → 04:0012:1748 min12:170 min20 Oct
Port of Spain04:53 → 04:0011:2748 min11:270 min20 Oct
London09:53 → 09:0012:2148 min12:210 min20 Oct
Durban10:53 → 10:0011:1748 min11:170 min20 Oct
Dubai12:53 → 12:0011:390 min11:3921 min21 Oct
Delhi14:23 → 13:3011:420 min11:4248 min21 Oct
Kolkata14:23 → 13:3010:570 min10:5748 min21 Oct
Singapore16:53 → 16:0012:250 min12:2548 min21 Oct
Sydney19:53 → 19:0012:160 min12:1648 min21 Oct
Suva20:53 → 20:0011:270 min11:2748 min21 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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